Improvement in pipe-cutters



UNITED STATES ERI SEWELL MOULTON, OF CHELSEA, MASSACHUSETTS.

IMPROVEMENT IN PIPE-CUTTERS.

Specification forming part of Letters Patent No. 116,210, dated June 20,1871; antedated June 9,1871.

To all whom it may concern:

Be it known that I, ERI SEwELL MOUL- ToN, of Chelsea, in the county ofSuffolk and State of Massachusetts, have invented certain new and usefulImprovements in Pipe-Cutters 5 and that the following is a full andexact description of the same, reference being had to the accompanyingdrawing.

This invention relates to that class of devices known as pipe and rodcutters 5 and it consists of a certain combination of parts, as willhereinafter more fully be set forth.

The invention consists, first, in providing the bearing-surface of theclamp or presser employed in said pipe-cutter with a roller or rollersarranged to be free to turn, for the purpose of reducing the friction ofsaid clamp upon the tube being cut as the cutter is turned about thesame or the tube is turned within the cutter; second, in the knife-barof said cutter being constructed with notches at such points that bymeans of a spring-catch arranged within the carrier or yoke saidknifebar can be fastened with the carrier at the proper point for theknife to cui a pipe and to allow of the insertion or removal of a pipe,when so desired, without necessitating the detachment of the knife-barfrom the carrier; third, in a novel arrangement and-construction of aspring-catch for fastening the knife-bar.

In the accompanying drawing my improvements in pipe-cutters areillustrated- Figure 1 being a side View of a Freeman pipe-cutter with myimprovements applied; Fig. 2, an edge view of the same for knife-bar;Fig. 8, a face view of the clamp or presser detached from the carrier;Figs. 4L and 5, sections in detail of the carrier and spring-catcharranged thereon, respectively, in planes of lines a: and y y, Fig. l;Fig. (i, an edge view of a portion ofthe length of the knife-bar; andFig. 7, across-section of knife-bar.

A inthe drawing represents a Freeman pipe-cutter,7 constructed, asdescribed in aforesaid Letters Patent, of a carrier or yoke, B, presseror clamp C, with operating-screw D, and bar E having a knife-blade, F,inserted in it for a portion of its length, and a handle, G, attached toone end. The bearing-surface of the presser or clamp C is provided withtwo friction-rollers, H, each arranged to turn freely on a separatecenter spindle or axis, I, within the frame of said clamp, and betweenits two side pieces, J. (See Fig. 3, more particularly.) These rollersreduce the friction or rub of the clamp on the pipe or tube on which thecutter is operating. The stock of knife-blade F is inserted in the twoends of the yoke B, passing across its width, the cutter-edge of theknife being toward the clamp. In one arm, K, of the yoke B is arranged asliding catch, L, provided with a projecting thumb piece, M, foroperating' it, and a spring, N, for holding it engaged with the notchesd of the knifestock E each side of the blade, the end f of the saidcatch interlocking with said notches being bifurcated so as to set overthe cuttingedge of the knife-blade. The notches d are shown as made attwo points in the length of the knife-bar, the one set at or nearthe-end of the bar, so that the knife can be drawn from across the yokewhen a pipe is to be inserted or removed and yet held secured to theyoke,

and the other set at a suitable point in the length of the bar to enablethe knife to be set by its point h in proper position for commencing tocut a pipe. In each end of the yoke is arranged a roller, l, forincreasing the freedom of the movement of the knife-bar through thesame, and for protecting the back of said bar E against wear fromfriction; it is provided with a steel facing or back, m. (See Fig. 7.)

Having thus described my improvements in pipe-cutters, what I claim asmyinvention, and l desire to secure by Letters Patent, is-

The sliding catch L bifurcated at its end f, with the spring N, botharranged within one 'of the arms K ofthe yoke B, and operated by a thumbpiece, M, in combination with the bar E and knife F, substantially asdescribed.

The above specification of my improvements in pipe-cutters signed by methis 19th day of September, A. D. 1870.

E. S. MOULTON.

Witnesses:

EDWIN W. BROWN, p ALBERT W. BROWN.

